osfmk/i386/mtrr.h

   1 /*
   2  * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _I386_MTRR_H_
  30 #define _I386_MTRR_H_
  31
  32 /*
  33  * Memory type range register (MTRR) support.
  34  */
  35
  36 #include <mach/std_types.h>
  37 #include <sys/appleapiopts.h>
  38 #include <sys/cdefs.h>
  39
  40 #ifdef __APPLE_API_PRIVATE
  41
  42 enum {
  43         MTRR_TYPE_UNCACHEABLE  = 0,
  44         MTRR_TYPE_WRITECOMBINE = 1,
  45         MTRR_TYPE_WRITETHROUGH = 4,
  46         MTRR_TYPE_WRITEPROTECT = 5,
  47         MTRR_TYPE_WRITEBACK    = 6
  48 };
  49
  50 __BEGIN_DECLS
  51
  52 extern void          mtrr_init(void);
  53 extern kern_return_t mtrr_update_cpu(void);
  54 extern kern_return_t mtrr_update_all_cpus(void);
  55
  56 extern kern_return_t mtrr_range_add(    addr64_t phys_addr,
  57                                         uint64_t length,
  58                                         uint32_t mem_type);
  59
  60 extern kern_return_t mtrr_range_remove( addr64_t phys_addr,
  61                                         uint64_t length,
  62                                         uint32_t mem_type);
  63
  64 extern void          pat_init(void);
  65
  66 __END_DECLS
  67
  68 #endif /* __APPLE_API_PRIVATE */
  69
  70 #endif /* !_I386_MTRR_H_ */